Hydrocarbon-motor.



racer rare.

nUssELr. HUFF, or DETROIT, MIciIIGAN, assIGNoR, BY MESNE ASSIGNMENTS, TO PACKARD MOTOR can COMPANY, or DETROIT, MICHIGAN, a CORPORATION or MICHIGAN.

1,208,969 0rigina1- application filed July 2, 1909,

tion is to provide a reciprocating member slidingly fitted in another member so that the sliding member will not stick orselze, due to the expansion caused by sub ectmg one portion of the reciprocating member to a greater temperature than another portion. This may be efi'ected by making the clearance between the sleeve and adjacent members at a point where the heat of combustion is most severe greater than at other points in the sleeve. As shown, the upper end of one of the sleeves is made a few thousandths less in diameter than the lower end. Another method of obtaining the desired result is to taper the sleeve toward the upper end.

Other objects will appear from the following description taken in connection with the drawings which form a part of this specification, and in which:

Figure 1 is a vertical transverse section of a 'sleeve'valve motor, and Fig. 2 is a detail view of one of the valve sleeves. Referring to the drawings, 11 designates the upper section of the; crank case provided with integral side arms 12 for supporting the engine 'structure'from the side bars of a motor vehicle, 13 the intermediate section, and '14 the lower section of the crank case. The crank shaft 15 is journaled in bearings between the sections 13 and 11; All of the sections arebolted together in a manner well understood by those skilled in the art.

The cylinders 16 are boltedto-thecrank case. These cylinders in the construction shown-are cast in pairs. Each cylinder is provided with a cylinder head 17 provided with a downwardly extended portion 18 of smaller diameter than the internal diameter of the cylinder,- thereby forming an annular Specification of Letters Patent.

HYDROCARBON-MOTOR.

Patented Dec. 19,1916.

Serial No. 505,735. Divided and this application filed March 29. 1912. Serial No. 687,204.

space or chamber 19. The downwardly projecting portion 18 is provided with the usual packing rings.

An inner valve sleeve :20 and an outer valve sleeve :21 are mounted to slide on each other in the cylinder. These valve sleeves are provided withears 22, and connecting rods 23 connect these cars with the eccentrics 25 mounted upon the valve shaft 24. These eccentrics are shown diagrammatically in Fig. 1 and are placed about eighty degrees apart. The sleeves are provided with inlet ports 28and exhaust ports 29.. communicating with the inlet 30 and exhaust '31 respectively. The operation of the valves thus described will be obvious from the. arrangement shown in Fig. l. 1

The piston l3. which of the usual trunk type, reciprocates with-in the inner sleeve 20 and is connected to the crank shaft 15 by means of the usual connecting rod H. The piston head is provided with an annular ledge t5, and with a series of holes 46 located above this ledge and communicating with similar holes *7 in'the valve sleeves 20 and 21. The oil thrown up bythe cranks is caught by the ledge l5 and lubricates the sleeves.

Referring to Fig. 2, the valve sleeves are provided with a helical groove communicating with the holes e7 hereinbefore described. The sleeves are also provided with transverse grooves 100 and 101 communicating by means of a groove 71, and a series of grooves 102 are provided communicating with the annular chamber 19.

In order toprevent the sticking of a valve sleeve due to unequal expansion a greater clearance is provided adjacent the ports or at the head end of the cylinder than at other portions thereof.. One way to obtain this unequal clearance'is to form the sleeve with an external. diameter at the head end C a few thousandths of an inch smaller than at the. other end D, as shown in an exaggerated way in- Fig.1.

The same result may be obtained by tapering the sleevestoward'the head or hotter end. i It is obvious, however, that this taper need be only very slight.

From the-foregoing description it will be apparent that I have provided an exceedingly simple and very efiicient means for preventing a member reciprocating in ancombination with a cylinder having a subother member and subjected to a greater temperature at one portion than another, from sticking or seizing, due to expansion caused by the difference in temperatures.

Having thus described my invention, what I claim is:

1. In an internal combustion engine, the combination with a cylinder having a substantially uniform interior diameter throughout its length, of a substantially cylindrical valve fitted therein, the outside diameter of said valve being smaller at one end than at the other end, whereby a greater clearance is.pro'vided at one end than at the other end.

2. In an internal combustion engine, the

stantially uniform interior diameter throughout its length, of a substantially cylindrical valve fitted in the cylinder, difierent parts of i which are adapted to be subjected to different temperatures, the part which is subjected to thehighest temperature having a smaller outside diameter than the other.

3. In an internal combustion. engine, the combination with a cylinder having a substantially uniform interior diameter throughout its length, of a substantially cylindrical valve fitted therein, the head end of said valve being of smaller outside diameter than the other end whereby a greater clearance is provided at one end than the other end.

4:. In an internal combustion engine, the combination of a cylinder member and a sleeve member slidingly fitted therein, said members formed with cooperating ports, the portion of the two members adjacent the ports being fitted with greater clearance than other portions, to allow for greater expansion.

5. In an internal combustion engine, the combination of a cylinder having a port, a piston working therein, a sleeve having a port and telescoped in said cylinder and surrounding said piston, said ports being adapted to cooperate to control the passage of gases therethrough, and said cylinder and sleeve being so formed as to provide a greater clearance adjacent said ports than at other portions ofsaid sleeve and cylinder.

6. Inan internal combustion engine, the combination with a cylinder having a substantially uniform interior diameter throughout its length, of a member fitted to reciprocate in said cylinder member and having a substantially cylindrical surface, the outside diameter of said surface adjacent one end of the member being less than at the other end, whereby a greater clearance is provided at the first mentioned end.

In testimony whereof I afiix my signature in presence of two witnesses.

RUSSELL HUFF.

"Witnesses 'W. H. FINOKEL, Jr, W. G. GERNANDT. 

